Amazing, complex, massive map! Excellent. As always, there are some elements that can/need to be ignored! F6/F7 is an absolute requirement. That last lightbrige puzzle getting to the top was epic! Thanks!

Cool chamber. However I don't know if I completed it in the way you intended. I got the companion cube out from the fizzler corridor with no problems - but then you need another cube to put on the second button to open the flap. There is no way I can see of getting another cube (the first cube of the chamber) into that annex, because the only entrance and exit have fizzlers over them. So the only solution I could find was a bit of a cheat. You can fire a portal through the tiny crack between the fllor and the glass panel, and simply portal your way down. You don't even need the companion cube from the corridor. . I'm sure this is not the way you intended it to be done - so do you have a hint on how you're supposed to get the second (first) cube into that annex?

trainphreak: spoiler alert - You need to hit the walk button (arrows here) just when you enter the portal, to make you drift in the right direction (over the top of the low grid). Took a few tries here, but it's very doable. [/spoiler[